From c26ab56ee95fe9b6a4daba6a80a6a7eaa82e760c Mon Sep 17 00:00:00 2001
From: Tim Keller <tjkeller.xyz>
Date: Wed, 21 May 2025 20:09:21 -0500
Subject: bios flashing and noise mitigation for librex60

---
 modules/hosts/libreX60/bios-flashing.nix      |  8 ++++++++
 modules/hosts/libreX60/configuration.nix      |  7 ++++++-
 modules/hosts/libreX60/powertop-auto-tune.nix | 17 +++++++++++++++++
 3 files changed, 31 insertions(+), 1 deletion(-)
 create mode 100644 modules/hosts/libreX60/bios-flashing.nix
 create mode 100644 modules/hosts/libreX60/powertop-auto-tune.nix

diff --git a/modules/hosts/libreX60/bios-flashing.nix b/modules/hosts/libreX60/bios-flashing.nix
new file mode 100644
index 0000000..6117813
--- /dev/null
+++ b/modules/hosts/libreX60/bios-flashing.nix
@@ -0,0 +1,8 @@
+# https://libreboot.org/docs/install/#thinkpad-t60x60x60tabletx60s
+
+{ pkgs, ... }: {
+	environment.systemPackages = [ pkgs.flashprog ];
+
+	boot.kernelParams = [ "iomem=relaxed" ];
+}
+
diff --git a/modules/hosts/libreX60/configuration.nix b/modules/hosts/libreX60/configuration.nix
index b2acd8c..6a681ed 100644
--- a/modules/hosts/libreX60/configuration.nix
+++ b/modules/hosts/libreX60/configuration.nix
@@ -1,5 +1,10 @@
 { config, lib, pkgs, ... }: {
-	imports = [ ./hardware-configuration.nix ];
+	imports = [
+		./hardware-configuration.nix
+		./powertop-auto-tune.nix
+		# Uncomment this module and reboot to enable bios flashing
+		#./bios-flashing.nix
+	];
 
 	# Use grub
 	bootloader = {
diff --git a/modules/hosts/libreX60/powertop-auto-tune.nix b/modules/hosts/libreX60/powertop-auto-tune.nix
new file mode 100644
index 0000000..0eb9578
--- /dev/null
+++ b/modules/hosts/libreX60/powertop-auto-tune.nix
@@ -0,0 +1,17 @@
+# https://en.wikibooks.org/wiki/Libreboot/ThinkPad_X60#Remove_High_Pitched_Whining_Noise
+# TLDR; running `powertop --auto-tune` is supposed to kill the high pitched noises produced by the X60
+
+{ pkgs, ... }: {
+	environment.systemPackages = [ pkgs.powertop ];
+
+	# Create systemd service
+	systemd.services.powertop-autotune = {
+		description = "Powertop Auto-Tune";
+		wantedBy = [ "multi-user.target" ];
+		after = [ "network.target" ];
+		serviceConfig = {
+			Type = "oneshot";
+			ExecStart = "${pkgs.powertop}/bin/powertop --auto-tune";
+		};
+	};
+}
-- 
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